Apart from risks, scientific studies also provide evidence for health benefits.
Winter swimming contributes to better general well-being. When compared to a control group on the profile of mood states rating scale, winter swimmers experience less stress and fatigue and more vigor. They report to have a better memory function, better mood and feel more energetic, active and brisk. Swimmers who suffer from rheumatism, fibromyalgia or asthma report that winter swimming relieves pain.
There are indications that winter swimmers do not contract diseases as often as the general population. The incidence of infectious diseases affecting the upper respiratory tract is 40% lower among winter swimmers when compared to a control group. Short term exposure of the whole body to cold water produces oxidative stress, which makes winter swimmers develop improved antioxidative protection.